package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper ordersMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 营业额数据统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnover(LocalDate begin, LocalDate end) {
        ArrayList<LocalDate> dateArrayList = new ArrayList<>();
        dateArrayList.add(begin);

        while (!begin.equals(end)){
            begin=begin.plusDays(1);  ////日期计算，获得指定日期后1天的日期
            dateArrayList.add(begin);
        }

        ArrayList<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateArrayList) {
            //每一天的起始时间和结束时间
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //需要查询的参数
            HashMap map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            //进行查询
            Double turnover = ordersMapper.sumByMap(map);
            turnover=turnover==null?0.0:turnover;
            turnoverList.add(turnover);
        }
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateArrayList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * 用户数据统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateArrayList = new ArrayList<>();
        dateArrayList.add(begin);

        while (!begin.equals(end)){
            begin=begin.plusDays(1);  ////日期计算，获得指定日期后1天的日期
            dateArrayList.add(begin);
        }

        //查询数据库来查看用户总量和新增用户量
        List<Integer> UserTotalList = new ArrayList<>();
        List<Integer> newUserList = new ArrayList<>();
        for (LocalDate date : dateArrayList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //查询用户总量
            Integer userTotal = userMapper.getUserCount(null,endTime);
            Integer newUser = userMapper.getUserCount(beginTime, endTime);
            //为空的话就使其等于0
            userTotal=userTotal==null?0:userTotal;
            newUser=newUser==null?0:newUser;

            UserTotalList.add(userTotal);
            newUserList.add(newUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateArrayList,","))
                .totalUserList(StringUtils.join(UserTotalList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    /**
     * 订单数据统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        ArrayList<LocalDate> dateArrayList = new ArrayList<>();
        dateArrayList.add(begin);

        while (!begin.equals(end)){
            begin=begin.plusDays(1);  ////日期计算，获得指定日期后1天的日期
            dateArrayList.add(begin);
        }
        //订单总数和有效订单总数和订单完成率
        Integer totalOrderCount=0, validOrderCount=0;
        Double orderCompletionRate=0.0;
        //每日订单数，每日有效订单数
        ArrayList<Integer> Total = new ArrayList<>();
        ArrayList<Integer> Valid = new ArrayList<>();
        for (LocalDate date : dateArrayList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //需要查询的参数
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", null);
            Integer DayTotal = ordersMapper.getDayTotalOrValidOrderCount(map);
            map.put("status", Orders.COMPLETED);
            Integer DayValid = ordersMapper.getDayTotalOrValidOrderCount(map);
            DayTotal=DayTotal==null?0:DayTotal;
            DayValid=DayValid==null?0:DayValid;
            //将每天的订单数和有效订单数加起来
            totalOrderCount+=DayTotal;
            validOrderCount+=DayValid;
            Total.add(DayTotal);
            Valid.add(DayValid);
        }
        //防止分母为0的情况
        if (totalOrderCount!=0){
            orderCompletionRate=validOrderCount.doubleValue()/totalOrderCount.doubleValue();
        }else {
            orderCompletionRate=0.0;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateArrayList,","))
                .orderCountList(StringUtils.join(Total,","))
                .validOrderCountList(StringUtils.join(Valid,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 销量排名top10
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOList = ordersMapper.getSalesTop10(beginTime, endTime);
        String nameList=StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()), ",");
        String numberList=StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()), ",");
        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出数据
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //获取近三十天的区间
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin, LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try{
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue("时间: "+begin+"至"+end);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            //获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row=sheet.getRow(7+i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());

            }
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            response.setHeader("Content-Disposition", "attachment; filename=运营数据报表.xlsx");
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);

            //关闭资源
            outputStream.flush();
            outputStream.close();
            excel.close();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}
